Audio transcription

You can publish tasks for transcribing small audio recordings. We recommend that the records in a pool should be of the same length. It is better to launch transcription tasks in the Toloka web version. This way performers can use keyboard for typing.

Let's say you need to transcribe poems recited by kids. To do this, create a task that provides an audio recording in the built-in player. The performer has to type the text they hear on the recording.

Example of a prepared task

To release tasks for completion and get responses:

Create a project

A project describes the task design for a performer.

  1. Click the + Create project button and choose the Audio transcription template.

  2. Enter a clear name and a short description for the project. Performers will see them in the task list.

  3. Write short and comprehensive guidelines (see the recommendations).

  4. Define which objects you are going to pass to the performers and receive from them in response. To do this, add input and output fields in the Specifications block.
    What are input and output data?

    Input data are types of objects that are passed to the performer for completing the task. For example, this could be a text, an image, or geographic coordinates.

    Output data are types of objects that you receive after the task is completed. For example, this could be one of several response options, typed text, or an uploaded file.

    More on input and output data fields.

    The template includes the fields:

    • Input data field — The audio link to an audio file.

      Change the data type to string to upload audio files stored on Yandex.Disk.

    • Output data field — The output string for saving the text entered by the performer.
  5. Create the task interface in the HTML block. It describes how the task elements should be arranged in the task.

    You can use standard HTML tags and special expressions in double curly brackets for input and output data fields.

    <div>
      <audio src={{proxy audio}} controls controlsList="nodownload">
        Unable to play
      </audio><br/><br/>
    </div>
    <div>
      <div>The poem text</div>
      {{field type="textarea" name="output" width="300px" rows="6"}}
    </div>
    This notation describes the following task design:
    • The audio recording in the player.
    • Text input field.

    Clear the CSS block.

    Leave the JavaScript unchanged. It is configured to check the record playback in the player. The performer won't be able to send the response without listening to all audio recordings in the task.

  6. Click the Preview button to see the task as a performer.
    Note. The preview shows four tasks with standard data. You can define the number of tasks to show on the page later.
  7. Save the project.

Add a task pool

A pool is a set of paid tasks sent out for completion at the same time.

  1. Open the project and click Add pool → Add pool.
  2. Give any name and description to the pool. The pool info is only available to you. Performers can view only the project name and description.
  3. Set the price per task page (for instance, $0.05). The price depends on the length of the audio recordings.
    What is a task page?

    A page can contain one or several tasks. If the tasks are simple, you can add 10-20 tasks per page. Don't make pages too long, as it slows down the performer's download speed.

    Performers get paid for completing the whole page.

    The number of tasks on the page is set when uploading tasks.

    What is the fair price for a task page?

    The general rule of pricing is the more time the performer spends to complete the task, the higher the price is.

    You can register in Toloka as a performer and find out how much other requesters pay for tasks.

  4. Set the Time allowed for completing a task page. This time should be enough to read the instructions, load the task, listen to audio recordings, and type text. For example, 1200 seconds.
  5. Set an Overlap, which is the number of performers to complete the same task. For the speech transcription, it is 1, as a rule.
  6. Turn on the Offline accept option and enter the number of days for checking in the Deadline field. For example, 7.
    What is offline accept?

    The review of assignments option allows you to review completed tasks before accepting them and paying for them. If the performer didn't follow instructions, you can reject the task. The maximum allowed period for the review is set in the Deadline field.

  7. Add Filters to choose performers.
  8. Save the pool.

Upload tasks

  1. Download the File example for task uploading (tsv) in the pool.
    What is TSV?
    A TSV file presents a table as a text file in which columns are separated by tabs.
    You can work with it both in a table editor and a text editor, and then save it to the desired format. More about working with a TSV file.
    Note. Before uploading the file, make sure it is saved in UTF-8 encoding.
  2. Add input data — relative links to audio files. The header of the input data column contains the word INPUT. Leave the other columns empty.
  3. Load of the tasks: choose Set manually and set, for example, 4 tasks per page. This means that there will be 4 audio recordings per page, each recording with a text field for transcription.

Set up quality control

Quality control rules allow you to filter out inattentive performers. You can configure quality control both in the project and in the pool.

  1. Go to the project and click Project actionsSet up quality control.
  2. Add a Quick answers limit and specify the following values:

    This means that a user who completes a task page in less than 20 seconds will be blocked for ten days and won't be able to complete your tasks.

  3. Add the Offline accept block and enter the following values:

    This means that if 35% or more of performer's responses are rejected, the performer is blocked and can't complete your tasks for 15 days. The rule takes effect after 3 responses of the performer are reviewed.

  4. Create a skill. To do this, go to the Skills page, click the +Add skill button and enter the skill name, for example, "Transcriber".
    What is a skill?
    A skill is an assessment of some aspect of the performer's work (a number from 0 to 100). A skill can be awarded to the performer for correct responses in control tasks. It can be appointed arbitrarily as well.

    You can use the skill value when choosing performers.

  5. Add the Submitted answers and enter the following values:

    This means that the skill is appointed to the performer if they completed at least one task and the result was accepted.

Start the pool and get the results

  1. Start the pool by clicking .
  2. Track the completion of tasks in the Pool statistics section.
  3. When the first results are received, you can start the review . After the specified time period, all responses are automatically accepted, regardless of their quality.

    To review assignments, go to the pool and click Review assignments.

Let performers check the responses

Send the results to performers for the review as tasks. To make these tasks available to performers who didn't transcribe audio recordings, set the filter.

  1. Go to the pool and click Download results.
  2. Create a project with the classification type.
    Example of a prepared task
  3. Create a task interface that shows:
    • An audio recording in the audio player.
    • A transcript.
    • Radio buttons with answer options.
      • The text fully matches the audio recording.
      • Minor mistakes were made in the text.
      • The audio recording is not transcribed fully.
      • The text doesn't match the audio recording.
  4. Add a pool and set Overlap to 3 in it.
  5. Add a filter to choose performers without skill:
  6. Upload tasks to the pool and start it.
  7. When the pool is fully completed, start aggregation of results.
  8. Accept transcription tasks without errors. Reject the rest, specifying the reason.
  9. Rejected tasks can be submitted for completion again.